body,ul,ol,li,h1,h2,h3,input{
  margin: 0;
  padding: 0;
  list-style: none;
  text-decoration: none;
  box-sizing: border-box;
}
body,html{
  display: flex;
  flex-direction: column;
  height:100%;
}
h1{
  color:red;
}